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Finding the Fourth Proportional to 123,354.78, 170,229.60 and 66,766.20

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Solution

The fourth proportional to 123,354.78, 170,229.60 and 66,766.20 is: 92,137.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,354.78 : 170,229.60 = 66,766.20 : x
  2. Step 2: Convert to fraction form
    123,354.78/170,229.60 = 66,766.20/x
  3. Step 3: Cross multiply
    123,354.78x = 170,229.60 × 66,766.20
  4. Step 4: Simplify right side
    123,354.78x = 11,365,583,519.52
  5. Step 5: Solve for x
    x = 11,365,583,519.52/123,354.78
  6. Step 6: Final answer
    x = 92,137.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.